阅读说明：本技术 一种具有内撑式夹紧结构的振动桩锤的夹桩器及使用方法 (Pile clamping device of vibrating pile hammer with internal support type clamping structure and using method ) 是由 曹小骥 曹荣夏 史小军 曹鹏 于 2020-12-10 设计创作，主要内容包括：本发明涉及建筑基础工程技术领域,具体来说是一种具有内撑式夹紧结构的振动桩锤的夹桩器,所述夹紧结构包括一套筒和一安装在所述套筒内的夹紧油缸,若干楔形推动块与所述油缸底部连接,所述油缸带动所述楔形推动块沿套筒轴向上下运动,若干楔形夹紧块与所述楔形推动块的位置相配合,且配合面为斜面,所述楔形推动块沿轴向上下运动,使楔形夹紧块沿套筒径向运动,向外撑开后抵住待夹紧的桩管的内壁。本发明所提供的一种具有内撑式夹紧结构的振动桩锤的夹桩器,可以嵌入在管桩内部,由内向外撑开夹紧管桩,完美解决传统桩夹紧装置无法沉入地下的难题,并且夹紧力更大,有利于沉桩作业。(The invention relates to the technical field of building foundation engineering, in particular to a pile gripper of a vibrating pile hammer with an internal-supporting type clamping structure, wherein the clamping structure comprises a sleeve and a clamping oil cylinder arranged in the sleeve, a plurality of wedge-shaped pushing blocks are connected with the bottom of the oil cylinder, the oil cylinder drives the wedge-shaped pushing blocks to move up and down along the axial direction of the sleeve, the wedge-shaped clamping blocks are matched with the wedge-shaped pushing blocks in position, the matching surface is an inclined surface, and the wedge-shaped pushing blocks move up and down along the axial direction to enable the wedge-shaped clamping blocks to move along the radial direction of the sleeve and abut against the inner wall of a pile pipe to be clamped after being outwards spread. The pile clamping device of the vibrating pile hammer with the internal support type clamping structure can be embedded into a pipe pile to clamp the pipe pile in a supporting mode from inside to outside, the problem that a traditional pile clamping device cannot be sunk underground is perfectly solved, the clamping force is larger, and pile sinking operation is facilitated.)

1. An internal stay formula stake clamping structure, its characterized in that includes:

a sleeve;

the clamping oil cylinder is arranged in the sleeve;

the wedge-shaped pushing blocks are connected with the bottom of the oil cylinder, and the oil cylinder drives the wedge-shaped pushing blocks to move up and down along the axial direction of the sleeve;

the wedge-shaped clamping blocks are matched with the wedge-shaped pushing blocks in position, the matching surface is an inclined surface, the wedge-shaped pushing blocks move up and down along the shaft, the wedge-shaped clamping blocks move radially along the sleeve, and the wedge-shaped clamping blocks support the inner wall of the pile pipe to be clamped after being radially opened outwards.

2. The internal stay type pile gripping structure of claim 1, wherein the wedge-shaped gripping block has an outer side with a friction surface contacting with the inner wall of the pile tube and an inner side with an inclined surface cooperating with the wedge-shaped pushing block.

3. The internal bracing pile clamping structure according to claim 1, further comprising a transition sleeve, wherein the transition sleeve is arranged at the upper part of the oil cylinder and is a splicing extension type transition sleeve.

4. The internal stay pile clamping structure of claim 1, wherein the number of the wedge-shaped clamping blocks is 4 or more than 4, and correspondingly, the number of the wedge-shaped pushing blocks is 4 or more than 4.

5. A vibro-pile hammer, comprising the internally supporting pile-gripping structure according to any one of claims 1 to 4.

6. A method of using a pile gripper for a vibratory pile hammer having an internally bracing clamping structure, the method comprising the steps of:

s1, driving the wedge-shaped pushing block to move downwards along the sleeve shaft by the clamping oil cylinder;

and S2, the wedge-shaped pushing block enables the wedge-shaped clamping block to move along the radial direction of the sleeve through the inclined plane in contact with the wedge-shaped clamping block, and the downward pressure of the clamping oil cylinder is amplified through the small-angle wedge-shaped surface and converted into the horizontal clamping force of the wedge-shaped clamping block on the inner wall of the pile pipe.

7. The method of using a pile gripper for a vibro-hammer having an internally bracing gripping structure according to claim 6, further comprising the steps of:

and S3, the contact surface of the wedge-shaped clamping block and the inner wall of the pile pipe is a friction surface, and when the horizontal clamping force is large enough, the pile pipe cannot slide relative to the wedge-shaped clamping block, namely, the pile pipe is clamped.

Technical Field

The invention relates to the technical field of building foundation engineering, in particular to a pile gripper of a vibrating pile hammer with an internal support type clamping structure.

Background

At present, common piling construction methods in the prior art all need to drive a pile top into the lower part of a foundation pit, namely, construction equipment which can drive the pile top into a plurality of meters below the ground is needed. The pile top is generally driven into the ground along the tubular pile through a pile clamping machine, but the traditional pile clamping machine cannot sink into the ground due to the limitation of a clamping mode, and how to drive the pile top into the deep position under the ground becomes a great problem faced by the construction method.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides an inside-out expanding type pile clamping structure, which is used for expanding a tubular pile so that the pile top can be driven into the underground deep.

In order to achieve the above object, a pile gripper for a vibrating pile hammer is provided with an internally supporting clamping structure, which comprises:

a sleeve;

the clamping oil cylinder is arranged in the sleeve;

the wedge-shaped pushing blocks are connected with the bottom of the oil cylinder, and the oil cylinder drives the wedge-shaped pushing blocks to move up and down along the axial direction of the sleeve;

the wedge-shaped clamping blocks are matched with the wedge-shaped pushing blocks in position, the matching surface is an inclined surface, the wedge-shaped pushing blocks move up and down along the shaft, the wedge-shaped clamping blocks move radially along the sleeve, and the wedge-shaped clamping blocks support the inner wall of the pile pipe to be clamped after being radially opened outwards.

The invention also has the following preferable technical scheme:

furthermore, the outer side of the wedge-shaped clamping block is a friction surface in contact with the inner wall of the pile pipe, and the inner side of the wedge-shaped clamping block is an inclined surface matched with the wedge-shaped pushing block.

Furthermore, the transition sleeve is arranged on the upper portion of the oil cylinder.

Further, the number of the wedge-shaped clamping blocks is 4 or more than 4, and correspondingly, the number of the wedge-shaped pushing blocks is also 4 or more than 4.

The invention also provides a pile gripper of the vibratory pile hammer, which comprises any one of the internal support type pile clamping structures.

In another aspect of the present invention, a method for using a pile gripper of a vibratory pile hammer having an internally bracing clamping structure is provided, comprising the steps of:

s1, driving the wedge-shaped pushing block to move downwards along the sleeve shaft by the clamping oil cylinder;

and S2, the wedge-shaped pushing block enables the wedge-shaped clamping block to move along the radial direction of the sleeve through the inclined plane in contact with the wedge-shaped clamping block, and the downward pressure of the clamping oil cylinder is amplified through the small-angle wedge-shaped surface and converted into the horizontal clamping force of the wedge-shaped clamping block on the inner wall of the pile pipe.

Further, the pile forming method further comprises the following steps:

and S3, the contact surface of the wedge-shaped clamping block and the inner wall of the pile pipe is a friction surface, and when the horizontal clamping force is large enough, the pile pipe cannot slide relative to the wedge-shaped clamping block, namely, the pile pipe is clamped.

Advantageous effects of the invention

The internal supporting type clamping device can be embedded into a tubular pile to support and clamp the tubular pile from inside to outside, and the problem that the traditional pile clamping device cannot be sunk underground can be perfectly solved. And the clamping force can be under the amplification effect on the small-angle inclined plane, so that the internal bracing type clamping device is more tightly clamped than the traditional clamping device, and the pile sinking operation is facilitated. In addition, according to the depth of the pile top required to be sunk, a transition sleeve with a certain height is connected, so that the sinking of the pile top with the depth of dozens of meters can be realized.

Drawings

FIG. 1 illustrates a schematic structural diagram of the present invention;

in the figure: 1. a transition sleeve; 2. clamping the oil cylinder; 3. a wedge-shaped pushing block; 4. a wedge-shaped clamping block; 5. a sleeve; 6. and (4) pile pipes.

Detailed Description

The technical solutions adopted by the present invention will be further described below by examples and drawings to help those skilled in the art to better understand the present invention.

The invention provides an internal bracing type pile clamping structure, which is shown in figure 1 and comprises a sleeve 5; the clamping oil cylinder 2 is arranged in the sleeve 5; the wedge-shaped pushing blocks 3 are connected with the bottom of the clamping oil cylinder 2, and the oil cylinder 2 drives the wedge-shaped pushing blocks 3 to move up and down along the axial direction of the sleeve 5; a plurality of wedge cramp blocks 4, wedge cramp block 4 with the position that wedge pushed piece 3 cooperatees, and the fitting surface is the inclined plane, wedge pushes piece 3 upward downstream along the axle, makes wedge cramp block 4 along sleeve 5 radial motion, 4 radial motion of wedge cramp block props after outwards strutting 6 inner walls of stake pipe. The outside one side of wedge clamp 4 be with the friction surface of 6 inner wall contacts of stake pipe, inside one side be with wedge promotes piece 3 matched with inclined plane, 2 upper portions of clamp cylinder are equipped with and splice extension formula transition sleeve 1

In a preferred embodiment of the invention, the number of wedge-shaped clamping blocks 4 is 4, and correspondingly, the number of wedge-shaped pushing blocks 3 is 4.

In another aspect of the present invention, a method for using a pile gripper of a vibratory pile hammer having an internally bracing clamping structure is provided, comprising the steps of:

s1, driving the wedge-shaped pushing block to move downwards along the sleeve shaft by the clamping oil cylinder;

and S2, the wedge-shaped pushing block enables the wedge-shaped clamping block to move along the radial direction of the sleeve through the inclined plane in contact with the wedge-shaped clamping block, and the downward pressure of the clamping oil cylinder is amplified through the small-angle wedge-shaped surface and converted into the horizontal clamping force of the wedge-shaped clamping block on the inner wall of the pile pipe.

And S3, the contact surface of the wedge-shaped clamping block and the inner wall of the pile pipe is a friction surface, and when the horizontal clamping force is large enough, the pile pipe cannot slide relative to the wedge-shaped clamping block, namely, the pile pipe is clamped.

As can be seen in fig. 1, one end of the clamping cylinder 2 is fixed in the sleeve 5 through a connecting rod and a cross beam, the other end of the clamping cylinder is movable, the wedge-shaped pushing block 3 is connected with the bottom plate, the inclined surface of the wedge-shaped pushing block 3 is matched with the inclined surface of the wedge-shaped clamping block 4, the downward pressure of the clamping cylinder 2 can be converted into the horizontal clamping force of the wedge-shaped clamping block 4 to the inner wall of the pile tube 6 through the matched inclined surface, and the downward pressure of the cylinder can be amplified according to the proportion of the complementary cutting angle of the inclined surface included angle due to the small inclined surface included angle between the wedge-shaped clamping block and the wedge-shaped pushing block to obviously increase the horizontal clamping force of the wedge-shaped clamping block 4 to the inner wall of the pile tube 6.

And according to the depth of the pile top to be installed, the sleeve 5 is connected with the transition sleeve 1 with a certain height, so that the sinking of the pile top with the depth of dozens of meters can be realized.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be within the technical scope of the present invention, and the technical solutions and novel concepts according to the present invention should be covered by the scope of the present invention.